发明名称 |
Radionavigation signal tracking device |
摘要 |
A radionavigation signal tracking device comprises a first and a second tracking stage for radionavigation signals. The first tracking stage comprises a first carrier phase-locked loop. The latter produces a first error signal arising from a phase difference between the first carrier and its replica. The phase of the replica of the first carrier is adjusted with the first error signal. The second tracking stage comprises a second carrier phase-locked loop. The latter produces a second error signal arising from a difference between the first phase difference and a phase difference between the second carrier and the replica thereof. The phase of the replica of the second carrier is adjusted with the first and second error signals. |
申请公布号 |
US9529070(B2) |
申请公布日期 |
2016.12.27 |
申请号 |
US201414152235 |
申请日期 |
2014.01.10 |
申请人 |
CENTRE NATIONAL D'ETUDES SPATIALES;M3SYSTEMS |
发明人 |
Vigneau Willy;Jardak Nabil;Paimblanc Philippe;Puengnim Anchalee;Ries Lionel |
分类号 |
G01S19/29;G01S1/02;G01S19/44 |
主分类号 |
G01S19/29 |
代理机构 |
Cantor Colburn LLP |
代理人 |
Cantor Colburn LLP |
主权项 |
1. A radionavigation signal tracking device comprising a first tracking stage of a first radionavigation signal contained in an incoming signal to be applied to the device, the first radionavigation signal comprising a first carrier at a first frequency modulated by a first spreading waveform, said first tracking stage comprising a first carrier phase-locked loop with a mixer configured to multiply the incoming signal with a local replica of the first carrier, the first carrier phase-locked loop comprising a phase discriminator of the first carrier configured to produce a first error signal arising from a first phase difference between the first carrier and the local replica of the first carrier, the first carrier phase-locked loop being configured to adjust the phase of the local replica of the first carrier on the basis of the first error signal;
a second tracking stage of a second radionavigation signal contained in the incoming signal, the second radionavigation signal comprising a second carrier at a second frequency, different from the first frequency, modulated by a second spreading waveform, the second tracking stage comprising a second carrier phase-locked loop with a mixer configured to multiply the incoming signal with a local replica of the second carrier, wherein the second carrier phase-locked loop comprises a phase discriminator of a beat phase between the first carrier and the second carrier configured to produce a second error signal arising from a difference between the first phase difference and a second phase difference between the second carrier and the local replica of the second carrier; and wherein the second phase-locked loop is configured to adjust the phase of the local replica of the second carrier on the basis of the first and second error signals. |
地址 |
Paris FR |